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Swainson's Warbler is a species of songbird belonging to the genus of the same name, found in the warblers family. These birds are known for their melodious and complex songs, which they sing throughout the year. They have a plump body with olive-green upperparts and yellow underparts, with a distinct eyestripe. Swainson's Warbler is primarily an insectivorous bird, feeding on a variety of arthropods. These birds breed in the southeastern United States and winter in Central America and the Caribbean. They prefer dense, mature forests and are often found close to water sources. Swainson's Warblers have a unique migratory behavior where they make long, non-stop flights over the Gulf of Mexico during their migration. This species is named after William Swainson, an English naturalist and ornithologist.